CN103179478A - Microphone suitable for operating under high illumination conditions - Google Patents
Microphone suitable for operating under high illumination conditions Download PDFInfo
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- CN103179478A CN103179478A CN2013101218786A CN201310121878A CN103179478A CN 103179478 A CN103179478 A CN 103179478A CN 2013101218786 A CN2013101218786 A CN 2013101218786A CN 201310121878 A CN201310121878 A CN 201310121878A CN 103179478 A CN103179478 A CN 103179478A
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- circuit board
- printed circuit
- microphone
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Abstract
The invention provides a microphone suitable for operating under high illumination conditions. The microphone suitable for operating under high illumination conditions comprises an outer shell which is internally provided with a back polar plate and a printed circuit board; the back polar plate is arranged close to the bottom surface of the outer shell; the printed circuit board is arranged far away from the bottom surface of the outer shell; the printed circuit board corresponding to the back polar plate is provided with a field effect transistor and a capacitor; the bottom surface of the outer shell has at least one outer shell sound hole; the back polar plate has at least one back polar plate sound hole; and the outer shell sound hole(s) and the back polar plate sound hole(s) are staggered. According to the invention, the problem of poor light resistant property of the microphone comprising the field effect transistor is solved; the microphone can operate normally under the illumination intensity of 100,000 luxes; and the manufacturing cost is low.
Description
Technical field
The present invention relates to microphone, be specifically related to a kind of microphone of working under high illumination condition of being adapted at.
Background technology
Field-effect transistor (Field Effect Transistor, abbreviation FET) as the important component part of microphone, in the course of work of microphone, plays the effect of impedance transformation or amplification.Field-effect transistor is arranged on printed circuit board (PCB) (Printed Circuit Board, abbreviation PCB), and is placed in the shell of microphone.
Yet, in prior art, if microphone is worked under high light, can make high light enter microphone inside by sound inlet or by printed circuit board (PCB), thereby field-effect transistor produces photovoltaic effect, causes the electric current, gain etc. of field-effect transistor to change, electric current, sensitivity that microphone is corresponding also change, thereby can make the microphone cisco unity malfunction.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of microphone of working under high illumination condition of being adapted at, and can solve the problem that existing microphone can cause electric current, sensitivity to change under high illumination condition.
Concrete technical scheme of the present invention is:
A kind of microphone of working under high illumination condition of being adapted at, comprise shell, be provided with back pole plate and printed circuit board (PCB) in described shell, the bottom surface that described back pole plate is close to shell arranges, described printed circuit board (PCB) arranges away from described bottom surface, is provided with field-effect transistor and electric capacity on the printed circuit board (PCB) corresponding with described back pole plate; Further, be provided with at least one shell sound hole on the bottom surface of described shell, be provided with at least one back pole plate sound hole on described back pole plate, the setting of staggering of described shell sound hole and back pole plate sound hole.
Further, described shell is upper shed shape structure, and described printed circuit board (PCB) is placed in the opening part of described shell, and described printed circuit board (PCB) comprises base material and Copper Foil, the overlapping both sides, base material up and down that are arranged at of described Copper Foil, the projection of described Copper Foil on printed circuit board (PCB) is continuous or partly overlapping.
Further, described shell is made of the materials such as copper, nickel, aluminium or its alloy.
Further, described printed circuit board (PCB) comprises at least one double-sided printed-circuit board.
Further, described printed circuit board (PCB) comprises at least one multiaspect printed circuit board (PCB).
Further, scribble the black solder resist on described printed circuit board (PCB).
Further, also be provided with the black waterproof net in the outside of described shell bottom surface.
Compared with prior art, technique scheme has following beneficial effect:
The preferred embodiments of the invention, by the setting of being staggered in the shell sound hole of microphone and back pole plate sound hole, and with the overlapping setting of Copper Foil on printed circuit board (PCB), solved the poor problem of microphone light resistance that contains field-effect transistor, thereby can realize that microphone is to work under the intensity of 100,000 Luxs in illumination, and cost of manufacture is low.
In the further embodiment of the present invention, the material of microphone case is copper, nickel, aluminium or its alloy, printed circuit board (PCB) is the two-ply of the overlapping setting of Copper Foil, thereby make this microphone have anti-power frequency effect preferably, the shieldings such as its power frequency are suitable with four laminates (multi-layer sheet) that do not carry out the overlapping setting of Copper Foil.
Description of drawings
Fig. 1 is the structural representation that the present invention is adapted at microphone one embodiment that works under high illumination condition;
Fig. 2 is the structural representation of PCB in microphone embodiment shown in Figure 1.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
as shown in Figure 1 a kind of is adapted at the microphone of working under high illumination condition, comprise microphone case 1, described shell 1 is upper shed shape structure, described shell 1 is inner near being provided with back pole plate 2 with place, shell bottom surface, be provided with at least one shell sound hole 11 on the bottom surface of described shell 1, be provided with at least one back pole plate sound hole 21 on described back pole plate 2, the setting of staggering of described shell sound hole 11 and described back pole plate sound hole 21, namely the part with the adjacent back pole plate 2 in described shell sound hole 11 is non-bore portion, with the part of the adjacent shell 1 in described back pole plate sound hole 21 be also non-bore portion, opening part at described shell 1 is provided with printed circuit board (PCB) 6, be provided with field-effect transistor 7 and electric capacity 8 on the printed circuit board (PCB) 6 that is close to described back pole plate 2 one sides, 9.
During concrete enforcement, also be provided with polar ring 5 between printed circuit board (PCB) 6 and back pole plate 2, described polar ring 5 is used for described printed circuit board (PCB) 6 is supported in the relevant position, so that described printed circuit board (PCB) 6, polar ring 5 and back pole plate 2 form a cavity, to satisfy transistor 7 and electric capacity 8,9 requirements of one's work.In addition, for guaranteeing the insulation between polar ring 5 and shell 1, also be provided with the cavity ring 4 of insulation between described polar ring 5 and shell 1.
The vibrating diaphragm of microphone can be arranged near shaking of shell and encircle, and also can be arranged on polar ring 5.That is to say, the structure of described microphone order from outside to inside can be " shell 1-vibrating diaphragm-pad 3-back pole plate 2-polar ring 5 ", also can be " microphone case 1-back pole plate 2-pad 3-vibrating diaphragm (polar ring film)-polar ring 5 " (rear a kind of scheme as shown in Figure 1, wherein " vibrating diaphragm " is not shown in the drawings).。
Certainly, the shape of described polar ring 5, cavity ring 4 and pad 3 is not to be necessary for annular, as long as described cavity ring 4 and polar ring 5 can be realized supporting role, described pad 3 can be realized vibrating diaphragm and back pole plate 2 are insulated, and its shape can be for arbitrarily.
During concrete enforcement, there is a gap between described shell 1 and back pole plate 2, form the mode in gap between described shell 1 and back pole plate 2, can be to be provided with a boss at the edge of described shell 1 bottom surface, described boss supports back pole plate 2, perhaps be provided with a pad between described shell 1 and back pole plate 2, form a gap between shell 1 and back pole plate 2 thereby make.
The disclosed microphone of the above embodiment of the present invention is in when work, and after audio frequency passed shell sound hole 11, bending occured at 2 places at described back pole plate, and then enters microphone inside by back pole plate sound hole 21; And light (comprising high light) is after by shell sound hole 11, owing to being blocked by the non-bore portion of described back pole plate 2, can't enter microphone inside.By such device, can make audio frequency pass through " gap between shell sound hole 11-shell 1 and back pole plate 2-back pole plate sound hole 21 " this path and enter microphone inside, therefore, can not affect the continuity of sound wave; And to the influential high light of field-effect transistor 7, blocked by the non-bore portion of shell 1 and back pole plate 2, can't enter microphone inside.Thereby, can make described microphone normal operation, can not use because of the former of high light thereby impact.
In the present embodiment, illustrated in Fig. 1 on same profile, be provided with a shell sound hole 11 and two back pole plate sound holes 21, certainly, the quantity in described shell sound hole 11 and two back pole plate sound holes 21 is not limited to above-mentioned number.
Described printed circuit board (PCB) 6 comprises base material 61 and Copper Foil 62,63.Wherein, described base material 61 is the insulating properties that keep between circuit and each layer, Copper Foil 62,63 is ground connection and bus plane, general base material 61 all has light transmission, the substrate for printed circuit board FR-4 that for example commonly uses, and Copper Foil 62,63 has photophobism and anti-power frequency, and described shell 1, back pole plate 2 and printed circuit board (PCB) 6 form a space, and field-effect transistor 7 and electric capacity 8,9 are placed in above-mentioned space.Described housing 1 is made of the material such as copper, nickel, aluminium or its alloy, and these materials not only have good conductivity, has also that excellent noise cuts off and the characteristic of shading.So the acting in conjunction of described housing 1 and printed circuit board (PCB) 6 can make this microphone have photophobism and anti-power frequency effect preferably.
The shape of the bottom surface that is provided with shell sound hole 11 of described housing 1 can be square, rectangle, circle or the arbitrary shape such as oval, and the shape of described bottom surface does not affect enforcement of the present invention.
Described printed circuit board (PCB) 6 comprises at least one circuitron substrate.particularly, described printed circuit board (PCB) 6 comprises base material 61 and Copper Foil 62, 63, described Copper Foil 62 and Copper Foil 63 are arranged at respectively the top and the bottom of base material 61, thereby form the hamburger type structure that described Copper Foil 62 and Copper Foil 63 are clamped base material 61, and described Copper Foil 62 and the overlapping setting of Copper Foil 63, that is to say, described Copper Foil 62 is at hollow part, be provided with Copper Foil 63 at substrate 61 opposite sides, and at described Copper Foil 63 at hollow part, be provided with Copper Foil 62 at substrate 61 opposite sides, certainly, also might all might be provided with in the both sides of described substrate 61 Copper Foil 62 and the Copper Foil 63 of non-hollow out, thereby form lighttight printed circuit board (PCB) 6.
certainly, described Copper Foil 62 and the overlapping setting of Copper Foil 63, the technical characterictic of the lighttight printed circuit board (PCB) 6 that forms, be not necessary for the present invention, when printed circuit board (PCB) 6 is printing opacity, the position of high light direct projection can be adjusted into shell 1 bottom surface (being that printed circuit board (PCB) is in shady face), perhaps will add at the lateral surface of described printed circuit board (PCB) 6 the lighttight device of one deck, for example, alloy shell 1 with good light-shading, at this moment, described printed circuit board (PCB) 6 can be the single-layer printed circuit substrate, perhaps arrange for Copper Foil 62 and the not overlapping situation of Copper Foil 63.
Selectively, can scribble the black solder resist on described printed circuit board (PCB) 6, further realize blocking light.
During concrete enforcement, the outside on the bottom surface of shell 1 also is provided with black waterproof net 10, further high light is blocked, and can play the effect of water proof and dust proof.Certainly, described waterproof net 10 can be other colors.
During concrete enforcement, the material of described shell 1 is the material of conductivity, for example, and copper, iron etc.
shell of the present invention 1 sidewall upper adopts and barb-like printed circuit board (PCB) 6 is fixed on the relevant position, that is to say, described barb-like sidewall presses the top of printed circuit board (PCB) 6, described polar ring 5 supports the bottom of printed circuit board (PCB) 6, acting in conjunction due to barb-like sidewall and polar ring 5, make printed circuit board (PCB) 6 be arranged on the fixed position, thereby can certain distance be arranged with back pole plate 2, make electric capacity 8, 9 and field-effect transistor suitable working space is arranged, and, described barb-like sidewall can also be electrically connected to the Copper Foil 62 of the upside of printed circuit board (PCB) 6 as wire.
Certainly, described barb-like sidewall is not necessary for the present invention, and described shell 1 also can be fixedly connected with printed circuit board (PCB) 6 with other forms such as bolts.
The below verifies the anti-smooth product effect of this microphone:
One, illumination method of testing
1. build circuit, the test condition of 2V, 2K is provided to microphone;
2. open the halogen light source machine, adjust the light source size, when the measured value of illuminance meter shows 100,000 LUX(luxs) time, fix test position;
3. microphone is placed on the fixed position, shines respectively shell 1 bottom surface and printed circuit board (PCB) face, and recording light is according to the current value of front and back.
Two, test data:
Three, test result:
By the halogen light source machine, place, this microphone case sound hole and printed circuit board (PCB) place are carried out the 100000 high illumination of LUX and shine, microphone current is monitored, draw:
1. irradiation shell sound hole, microphone bottom surface is located, and the microphone current changing value is between 0-10 μ A (microampere), and mean change numerical value is 2.9 μ A;
2. shine the printed circuit board (PCB) place of microphone, the microphone current changing value is between 1-10 μ A (microampere), and mean change numerical value is 5.35 μ A.
Thus, can clearly be seen that, by to the place, shell sound hole of microphone and the improvement of printed circuit board (PCB), when this microphone was worked under high light, its curent change value was less than 10 μ A (microampere).
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. one kind is adapted at the microphone of working under high illumination condition, it is characterized in that,
Comprise shell (1), be provided with back pole plate (2) and printed circuit board (PCB) (6) in described shell (1), the bottom surface that described back pole plate (2) is close to shell (1) arranges, described printed circuit board (PCB) (6) arranges away from described bottom surface, is provided with field-effect transistor (7) and electric capacity (8,9) on the printed circuit board (PCB) (6) corresponding with described back pole plate (2);
Be provided with at least one shell sound hole (11) on the bottom surface of described shell (1), be provided with at least one back pole plate sound hole (21) on described back pole plate (2), the setting of staggering of described shell sound hole (11) and back pole plate sound hole (21).
2. microphone as claimed in claim 1, is characterized in that,
Described shell (1) is upper shed shape structure, described printed circuit board (PCB) (6) is placed in the opening part of described shell (1), described printed circuit board (PCB) (6) comprises base material (61) and Copper Foil (62,63), the overlapping both sides, base material (61) up and down that are arranged at of described Copper Foil (62) and Copper Foil (63), described Copper Foil (62) and the projection of Copper Foil (63) on printed circuit board (PCB) (6) are continuous or partly overlapping.
3. microphone as claimed in claim 1, is characterized in that, described shell (1) is made of copper, nickel, aluminium or its alloy material.
4. microphone as described in any one in claims 1 to 3, is characterized in that,
Described printed circuit board (PCB) (6) comprises at least one double-sided printed-circuit board.
5. microphone as described in any one in claims 1 to 3, is characterized in that,
Described printed circuit board (PCB) (6) comprises at least one multilayer board.
6. microphone as described in any one in claims 1 to 3, is characterized in that,
Scribble the black solder resist on described printed circuit board (PCB) (6).
7. microphone as described in any one in claims 1 to 3, is characterized in that,
The outside in described shell (1) bottom surface also is provided with black waterproof net (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310121878.6A CN103179478B (en) | 2013-04-09 | 2013-04-09 | It is suitable for the mike worked under high illumination condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310121878.6A CN103179478B (en) | 2013-04-09 | 2013-04-09 | It is suitable for the mike worked under high illumination condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103179478A true CN103179478A (en) | 2013-06-26 |
| CN103179478B CN103179478B (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310121878.6A Active CN103179478B (en) | 2013-04-09 | 2013-04-09 | It is suitable for the mike worked under high illumination condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103179478B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417661A (en) * | 2016-07-15 | 2019-03-01 | 松下知识产权经营株式会社 | Microphone unit and the noise reducing device and integrated circuit components for using it |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201204694Y (en) * | 2008-02-29 | 2009-03-04 | 深圳市豪恩电声科技有限公司 | Capacitance microphone |
| CN202231836U (en) * | 2011-08-26 | 2012-05-23 | 美律电子(深圳)有限公司 | Mini capacitive microphone having simple structure |
| CN202679622U (en) * | 2012-07-11 | 2013-01-16 | 深圳市新厚泰塑胶电子有限公司 | Electret microphone with anti-electromagnetic interference function, and PCB (Printed Circuit Board) |
| CN202679623U (en) * | 2012-05-25 | 2013-01-16 | 歌尔声学股份有限公司 | Mems microphone |
| CN202856971U (en) * | 2012-09-26 | 2013-04-03 | 瑞声声学科技(常州)有限公司 | Electret microphone |
| CN203233538U (en) * | 2013-04-09 | 2013-10-09 | 山东共达电声股份有限公司 | A microphone suitable for operating under a high illumination condition |
-
2013
- 2013-04-09 CN CN201310121878.6A patent/CN103179478B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201204694Y (en) * | 2008-02-29 | 2009-03-04 | 深圳市豪恩电声科技有限公司 | Capacitance microphone |
| CN202231836U (en) * | 2011-08-26 | 2012-05-23 | 美律电子(深圳)有限公司 | Mini capacitive microphone having simple structure |
| CN202679623U (en) * | 2012-05-25 | 2013-01-16 | 歌尔声学股份有限公司 | Mems microphone |
| CN202679622U (en) * | 2012-07-11 | 2013-01-16 | 深圳市新厚泰塑胶电子有限公司 | Electret microphone with anti-electromagnetic interference function, and PCB (Printed Circuit Board) |
| CN202856971U (en) * | 2012-09-26 | 2013-04-03 | 瑞声声学科技(常州)有限公司 | Electret microphone |
| CN203233538U (en) * | 2013-04-09 | 2013-10-09 | 山东共达电声股份有限公司 | A microphone suitable for operating under a high illumination condition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417661A (en) * | 2016-07-15 | 2019-03-01 | 松下知识产权经营株式会社 | Microphone unit and the noise reducing device and integrated circuit components for using it |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103179478B (en) | 2016-09-14 |
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Address after: 261200 No. 68 Fengshan Road, Fangzi District, Weifang City, Shandong Province Patentee after: Gongda Electroacoustics Co., Ltd. Address before: 261200 No. 68 Fengshan Road, Fangzi District, Weifang City, Shandong Province Patentee before: Shandong Gettop Acoustic Co.,Ltd. |